Full Spectrum + Infrared SAD Light PanelDescription Specs The World's Most Optimal Light Therapy SAD Lamp The Full Spectrum Light Therapy Lamp emits medical grade, full spectrum visible light along with broad range near infrared light that closely resembles both the sun's spectrum and intensity of natural light. This makes the Full Spectrum Light Therapy SAD Lamp the best bright light therapy lamp you can use because it emits the same spectrums and levels of light we are exposed to outside.